1) You don't have to provide private info like CC number.
2) If you bought bitcoins at X and now they are valued at 10X you may effectively enjoy 90% discount on all purchases.
All these mythical user-protecting chargebacks are almost never used by consumers for refunds (companies who care about brand help them settling refunds) and almost always for the cases when you CC details got stolen and used by someone else. Of course, bitcoin payments do not leak your private keys, so the entire class of problems goes away.